iooioio
How to get color output from `mix compile` invoked via `System.cmd`?
I have a mix task that runs invokes mix test with various environment variables (MIX_ENV=xxx). The line for the invocation essentially looks like this:
System.cmd("mix", ["test", "--color"], into: IO.stream(:stdio, :line))
That gives me colorized output for the tests.
However, if any compiling takes place before running the tests, the output is not colorized. So I might get warnings but they won’t be yellow.
This can also be reproduced by replacing the invocation of mix test directly with mix compile.
How can I get the output fully colorized?
Most Liked
shanesveller
I had to solve for this at one point and I can’t readily find the reference I cited, but this appears to be working for me:
System.cmd("elixir", ["--erl", "-elixir ansi_enabled true", "-S", "mix", "test"], into: IO.stream(:stdio, :line))
In my case I was using it as part of mix cmd like so:
mix cmd --app ... elixir --erl \"-elixir ansi_enabled true\" -S mix ...
Popular in Questions
Other popular topics
Latest on Elixir Forum
Sponsor Spotlight
Supporting innovation across the BEAM ecosystem.
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #deployment
- #library
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #channels
- #elixirconf
- #exunit
- #discussion
- #code-sync
- #javascript
- #podcasts
- #onsite
- #dialyzer
- #docker
- #authentication
- #umbrella
- #full-time-contract
- #podcasts-by-brainlid
- #ecto-query
- #elixir-ls
- #phoenix_html
- #iex
- #blog-post
- #graphql
- #genstage
- #ai
- #websockets
- #supervisor
- #advent-of-code
- #elixirconf-us
- #distillery
- #processes
- #forms
- #api
- #metaprogramming
- #security
- #performance
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Error tracking for Elixir devs who love to ship. Start your free account.
Practical resources that improve the lives of professional developers.
Develop your skills with books, videos, and courses.
Enabling companies to succeed by building software people love.
The team behind Membrane, Popcorn, LiveDebugger. Available for hire.
Courses that'll move you from confusion to "Aha, now I get it!"